ML20138C091
| ML20138C091 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 03/31/1986 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE |
| To: | Noonan V Office of Nuclear Reactor Regulation |
| References | |
| REF-GTECI-A-36, REF-GTECI-SF, RTR-NUREG-0612, RTR-NUREG-612, TASK-A-36, TASK-OR SBN-977, NUDOCS 8604020209 | |
| Download: ML20138C091 (4) | |
Text
.
7' P
SEABROOK STATION Engineering Office Pubsc Service of New Hampshke Now Hampshire Yankee Division March 31, 1986 SBN-977 T.F. B7.1.2 Uaited States Nuclear Regulatory Commission Washington, DC 20555 Attention:
Mr. Vincent S. Noonan, Project Director PWR Project Directorate No. 5
References:
(a) Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 and 50-444 (b) PSNH Letter, SBN-887, dated October 31, 1985, " Control of Heavy Loads: NUREG-0612 (Revised Report)," J. DeVincentis to G. W. Knighton
Subject:
Control of Heavy Loads: NUREG-0612
Dear Sir:
Enclosed please find, as Attachment 1, a revision to the heavy loads report submitted in Reference (b). This revision deletes the requirement for the preoperational load test of the polar crane. Our justification for deleting this test is provided in Attachment 2.
We request that the acceptability of the enclosed change to our heavy loads report be reflected in the next supplement to Seabrook's SER.
Very truly yours,
)
b A' &
ohn DeVincentis, Director Engineering and Licensing Enclosures
,cc: Atomic Safety and Licensing Board Service List 8604020209 860331 0
PDR ADOCK 05000443 9
A PDR Q
P.O Box 3OO e Sootycok.NHO3874. Torophone(603)474-9521
F C
Dirn2 Curr n Pstar J. Math wa, Mayor Harmon & Weiss City Hall 20001 S. Street, N.W.
Newburyport, MA 01950 Suite 430 Washington, D.C.
20009 Calvin A. Canney City Manager Sherwin E. Turk, Esq.
City Hall Office of the Executive Legal Director 126 Daniel Street U.S. Nuclear Regulatory Commission Portsmouth, NH 03801 Washington', DC 20555 Stephen E. Merrill Robert A. Backus, Esquire Attorney General 116 Lowell Street Dana Bisbee, Esquire P.O. Box 516 Assistant Attorney General Manchester, NH 03105 Office of the Attorney General 25 Capitol Street Philip Ahrens, Esquire Concord, NH 03301-6397 Assistant Attorney General Department of The Attorney General Mr. J. P. Nadeau Statehouse Station #6 Selectmen's Office Augusta, ME 04333 10 Central Road Rye, NH 03870 Mrs. Sandra Gavutis Designated Representative of Mr. Angie Machiros the Town of Kensington Chairman of the Board of Selectmen RFD 1 Town of Newbury East Kingston, NH 03827 Newbury, MA 01950 Jo Ann Shotwell, Esquire Mr. William S. Lord Assistant Attorney General Board of Selectmen Environmental Protection Bureau Town Hall - Friend Street Department of the Attorney General Amesbury, MA 01913 One Ashburton Place, 19th Floor Boston, MA 02108 Senator Gordon J. Humphrey 1 Pillsbury Street Senator Gordon J. Humphrey Concord, NH 03301 U.S. Senate (ATTN: Herb Boynton)
Washington, DC 20510 (ATTN: Tom Burack)
H. Joseph Flynn Office of General Counsel Diana P. Randall Federal Emergency Management Agency 70 Collins Street 500 C Street, SW Seabrook, NH 03874 Washington, DC 20472 Richard A. Hampe, Esq.
Matthew T. Brock, Esq.
Hampe and McNicholas Shaines, Madrigan & McEachern 35 Pleasant Street 25 Maplewood Avenue Concord, NH 03301 P.O. Box 360 Portsmouth, NH 03801 Donald E. Chick Town Manager Gary W. Holmes, Esq.
Town of Exeter Holmes & Ells 10 Front Street 47 Winnacunnet Road Exeter NH 03833 Hampton, NH 03841 Brentwood Board of Selectmen Ed Thomas RFD Dalton Road FEMA Region I Brentwood, NH 03833 John W. McCormack PO & Courthouse Boston, MA 02109
o-ATTACHMENT 1 SBN-977
!.A-1.
i.
2.
Modification of the polar crane is not required.
'3.
Main Holst i
The polar crane main hoist was tested to 525 tons (1.25 X Design) prior to construction and was used for heavy loads (a minimum of 5 loads in excess of MCL) during construction..The polar crane has since been derated per NUREG-0612 so no loads greater than h of the original design load (McL = 210 tons) will be~1ifted in the future. The crane manufacturer has reinspected the polar crane and it will be refurbished as necessary prior to system turnover to operations.
Therefore, no load test prior to plant operation is to be performed. An operational (no load). test will be performed as recommended by ANSI.B30.2.
Auxiliary Hoist The polar crane auxiliary hoist was tested to 62.5 tons (1.25 X Design) prior to construction and was used for heavy. loads during construction. The polar crane has since been derated per NUREG-0612.so no L
loads greater than of the original design load (MCL = 25 tons) will'be lifted in the future except the auxiliary equipment hatch cover (40 tons) for which an acceptable drop analysis has been provided. The 40 ton lift serves as the pre-operational l
test for loads < 25 tons not allowed to drop (1.25 X 25 =
31.25 tons.) The crane manufacturer has reinspected the polar crane and it will.be refurbished as necessary prior to system turnover to operations.
l 4.
NDE extent and acceptance criteria were not defined in the crane specification for removal from con-struction phase to plant operation phase. These are defined in a written procedure. l
SBN-977 ATTACHMENT 2 Justification for No Preoperational Load ~
Test of The Polar Gantry Grane Main Holst
- 1. -
Prior to construction use, the crane was tested to 125 percent of design (420 x 1.25 = 520 tons). There have been no major modifications to the crane that could invalidate the above test.
2.
During construction, the crane handled many loads, specifically the reactor vessel-(420 tons) and the four steam generators (360 tons each) that were significantly in excess of the selected Maximum Critical Load (MCL) of 210 tons.
3.
The MCL of 210 tons provides a very conservative margin of safety, design lift to actual lift (420/210), of 200 percent.
Furthermore, the maximum expected load, with fuel in the reactor vessel, over the life of the plant of 160 tons provides even a more conservative margin of safety (420/168) of 312.5 percent.
4.
The crane has undergone a reinspection by the crane manufacturer who, other than identifying certain items which need to be refurbished or replaced prior to turnover to operations, found the crane to be in satisfactory condition. The manufacturer will provide a report documenting his inspection and the acceptance condition of the crane.
5.
An operational (no-load) test, as recommended by ANSI-B30.2, will be performed in turnover to operations.
6.
The extent of nondestructive examination performed and the level of quality control applied to the fabrication of the crane has already been presented in our response to NUREG-0612.
Auxiliary Hoist 1.
One of the last construction lifts to be done by the auxiliary hoist is to close the auxiliary equipment hatch for the containment pressure test (40 tons). This will be used as the 31.25 ton (1.25 x MCL) test.
Note:- Page 63 of the Heavy Loads Report stated that the DRL test is 62.5 tons; 62.5 tons is no longer correct.
,